Journal
MATERIALS & DESIGN
Volume 61, Issue -, Pages 228-238Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2014.04.054
Keywords
Aluminum alloy; Corrosion resistance; Mechanical property; Precipitate
Categories
Funding
- National Natural Science Foundation Council of China [51375502]
- National Key Basic Research Program [2010CB731702]
- Shenghua Yu-ying Program and State Key Laboratory of Materials Processing and Die 82 Mould Technology, Huazhong University of Science and Technology, China [2012-P04]
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Creep-aging forming, combining both the aging treatment and forming process, has recently drawn much attention of researchers. In this study, the effects of creep-aging processing on the corrosion resistance of an Al-Zn-Mg-Cu alloy are studied. Results show that the corrosion resistance of the studied Al-Zn-Mg-Cu alloy is sensitive to creep-aging processing parameters (creep-aging temperature and applied stress). With the increase of creep-aging temperature, the corrosion resistance first increases and then decreases. Increasing the applied stress can deteriorate the electrochemical corrosion resistance and improve the exfoliation corrosion resistance. The creep-aging processing can change the size and distribution of precipitates in the aluminum matrix, which significantly affects the corrosion resistance. The discontinuous grain boundary precipitates and narrow precipitate-free zones can enhance the corrosion resistance. (C) 2014 Elsevier Ltd. All rights
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